Briggs, D. (Mayıs 1992). "Conodonts: a major extinct group added to the vertebrates". Bilim. 256 (5061). s. 1285–1286. doi:10.1126/science.1598571. PMID1598571.
Bourlat, S. J; T. Juliusdottir, C. J Lowe, R. Freeman, J. Aronowicz, M. Kirschner, E. S Lander, M. Thorndyke, H. Nakano, A. B Kohn, others (2006). "Deuterostome phylogeny reveals monophyletic chordates and the new phylum Xenoturbellida". Nature. 444 (7115). ss. 85-88. doi:10.1038/nature05241. ISSN0028-0836. PMID17051155.KB1 bakım: Birden fazla ad: yazar listesi (link)
nih.gov
ncbi.nlm.nih.gov
Briggs, D. (Mayıs 1992). "Conodonts: a major extinct group added to the vertebrates". Bilim. 256 (5061). s. 1285–1286. doi:10.1126/science.1598571. PMID1598571.
Bourlat, S. J; T. Juliusdottir, C. J Lowe, R. Freeman, J. Aronowicz, M. Kirschner, E. S Lander, M. Thorndyke, H. Nakano, A. B Kohn, others (2006). "Deuterostome phylogeny reveals monophyletic chordates and the new phylum Xenoturbellida". Nature. 444 (7115). ss. 85-88. doi:10.1038/nature05241. ISSN0028-0836. PMID17051155.KB1 bakım: Birden fazla ad: yazar listesi (link)
worldcat.org
Bourlat, S. J; T. Juliusdottir, C. J Lowe, R. Freeman, J. Aronowicz, M. Kirschner, E. S Lander, M. Thorndyke, H. Nakano, A. B Kohn, others (2006). "Deuterostome phylogeny reveals monophyletic chordates and the new phylum Xenoturbellida". Nature. 444 (7115). ss. 85-88. doi:10.1038/nature05241. ISSN0028-0836. PMID17051155.KB1 bakım: Birden fazla ad: yazar listesi (link)